The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  4  0  2  1  0  0
 0  2  0  0  0  2  6  2  0  4  4  0  0  2  2  2  4  4  2  0  2  6  2  2
 0  0  2  0  2  2  6  0  0  0  2  6  2  6  4  2  0  4  4  4  0  0  0  2
 0  0  0  2  2  0  6  2  4  2  2  0  6  4  6  4  2  6  2  2  6  4  0  2
 0  0  0  0  4  0  0  0  0  4  0  0  4  0  4  4  4  0  4  0  4  4  0  0
 0  0  0  0  0  4  0  4  4  4  4  0  0  0  4  4  0  0  4  0  0  0  0  4
 0  0  0  0  0  0  4  4  0  0  4  4  4  4  0  0  4  4  4  0  0  4  4  0

generates a code of length 24 over Z8 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+150x^18+337x^20+128x^21+606x^22+384x^23+860x^24+384x^25+678x^26+128x^27+302x^28+98x^30+35x^32+4x^34+1x^36

The gray image is a code over GF(2) with n=96, k=12 and d=36.
This code was found by Heurico 1.16 in 60.2 seconds.